Artificial　factors　inducing　ecological　degradation　in　Tibet　and　it＇s　spatial　effects　are　studied　applying　canonical　correlations　analysis　and　Geographical　information　system　(GIS)　spatial　analysis　techniques.　Population　was　the　main　artificial　factor　of　ecosystem　degenerated　in　Tibet,　while　ecological　effect　of　construction　investment　was　relatively　complex.　The　ecological　degradation　in　northwest　of　Tibet　was　induced　mainly　by　natural　factor.　The　artificial　factor　in　the　middle　area　of　Brahmaputra,　Lhasa　River　and　Nianchu　River　induced　relatively　strong　ecological　degradation　action.　The　ecological　degradation　was　induced　obviously　by　artificial　factor　in　the　east　of　Tibet.　The　artificial　disturbance　in　southeast　of　Tibet　was　not　great.